What genre of FICTION would this be?

I have an idea - it may become 3 or more books. However, suggestions have been all over the place as to what "genre" I am falling in. Here is the premise:"10year old boy, taken in my foster family - has lost his memory - tragedy strikes when he turns 18, nothing graphic - parts of his memory begins to return - sets out to solve the mystery of his past." Now, I've been told it is cozy mystery, then another said no, young adult fiction. I think it kind of reads like a "Hallmark" movie. Parts are serious - other parts light-hearted. I am continuing with creating backstories so I can keep my facts straight throughout the story (back story facts come out only when needed). I'm just trying to see if I fit into a mystery category - a young adult category - a hybrid of categories - Is their such a thing as a "family-friendly" genre? Thanks for sharing.